Pseudococculina rimula, a new species (Cocculiniformia: Pseudococculinidae) from off southeastern Brazil

9 Pages·2003·2.9 MB·

by  Luiz Ricardo L Simone

THE NAUTILUS 1 17(.3):69-77. 2003 Paec> 69
FscudococcuJiwa rinmla, a new species (Cocciilinifoniiia:
Pseudoeocculinidae) from off southeastern Brazil
Luiz Ricardo L. Sinionc
Carlo Magenta C.'iinlia
\liisiii di' Zoiilii',:,],! ila I iiiM'isulaili'
lie Siio Faiild
(.aixa Postal 42594
04299-970 sail I'aiiln
BRAZIL
IrsiinoneCs'ii'-p l)r
ABSTRACT ative. The li:nil structures (railnia and shell) were also
(F}s||ritullioecosctcaitielioitKiRiroiiidiuelaJ,anneeirwo,spienciseosn,tliiseadsetesneiribBreadz.il,Itatoe3e5u0r-s eExlaemtrionneiiclaindoa MSZLS,PM,inaltshoeuLsailnigortaitaidniitoioduaelMtieeclrmoisicjioipeisa.
400 111 depth. This is tlie fist report ofthe ^einis in tlie .-Xthmtie All drawings were made v\itii the aid of a camera Ineida.
Oeean. The main ihaj^nostie characters ol the new species are: Ahhreviatioiis used in the figures are: an, anus; ap, ap-
shell high, lacking radial scnlptiirt'; snout Hat. somewhat in- eiture ol goiKidnct; au, ;iuriele; bin, hueeal mass; br,
\()l\ed b\' oral lappets; posterior odontophore cartilages con- suhniduhu' nieuilirane; bs, l)lootl sinus; ee, cerebral gan-
nectedto anteriorone in median line: ^onad connected to pos- glion; c'>, lienidial vein; dc, dorsal chamber of buccal
terior end of pallial caxits' li\' a gonoduct runnmg transwrsalK mass; dd, duet lo digestive gland: df, dorsal fold ofbuc-
and dorsalK- in \isceral mass; sperm dnct inostK' closed (tn- cal mass; dg, ihgestive gland: di, diaphragm-like septnm
hular), prostate located inside n'j,lit tentaclo: sperm ilnct open-
ing in a snhterminal papilla. separating buccal mass fiom visceral mass: ef, esopha-
geal folds; ep, epipoilimn; e.s. esophagus: et, epipodial
Addiliniiiil kiiiitiiids .\nafiim\. southwestern Athmtic. Rio de
tentacle; fs, loot sole; ft, foot: gb, gonoduct; gi, gill; go,
Janeiro
goiuiil; he, IkmiI; bm, head nmsele; in, intestine;jw, jaw:
kl, left kidiiev; kr, right kiilnev: ml—in8, extrinsic and
IXTKODUC.TION uitriusic odontophore muscli's: nib, mantle edge; nic,
mouth sphincter; nif, m;nitle folil; nij, jaws, buccal, and
Tlie C^oecitliiiitnniiia encompasses taxa with an eni<Tinat- oial tube muscli'S; mo, month: oc, anteriorodontophore
ie set ol primitive and derixate features. Its closest cartilage; od, odontophore; ol, or;il lappet; ov, ovai"v: pe,
groups are \et to lie determined, and it is still question- peiicardiuni: po, posterior odontophore I'artilage: pp,
alili- wlietlu-r the taxon is monoplnletie. Tliexare usualK' papilla ol copulaloi'V leiit;iele: pt, jirostate; pu, pedal
minute, patellilorm gastropods living in the deep sea. ganglion; ra, radula; ni, radular mieleus; rs, radular sac;
Two papers lia\i' lieen pulilished dealing with eoeen- rt, rectinu; se, snbr;iilulai' cartilage: sd, sperm duct: sc,
liniform gastropods lonnil in deep waters off Brazil: Si- chamber origiiuitiug esophagus and separating oilouto-
mone (1996) deserilied an addisoniid. anil Leal and Si- phore in buccal uklss: .sni, shell muscle; sn, snout: st,
mone (20001 nanieii a pseuiloeoeeuliTiJil. Both papers stomaiii; te, cephalic tentacle; tg, integument; tp, cop-
provided anatoiiiie:il nilormatiou. which is \ital hir nn- uhiton right cephalic tentacle; ts, testis: ve, ventricle:
derstaniling the svstematies of the group. Fuithei- data vm, visceral mass.
on western .Vtlantic eoceuliuihirmians have lieiMi provid- Institutional abbreviatioirs used are; .\1N1L\, .Musi iini
ed bv McLean and llarasewAi-li l 199.5) and Leal ami National dllistoire Naturelle, Paris, France; M\li|,
Harasewveh (1999), \lnsen Nacional, Universidade Federal do Rio de |a-
The present jiaper pidvides tlie ileseiiplinn ol a thud neiro, Rio de [aneiro, Brazil; MZSP. Mnsen de Zoologi;i
Brazilian species, which was collected In an otter trawl da L'niversiikide de S;io Paulo. S;io P;iuIo, Br;i/il.
oil the coast ol Sao Banio State, in sontliea.stern Brazil.
MATLRIAI.S A\n MFTIIODS SV.STF.MATICS
(a'uns l'\iU(ltiiiu-(iilhiii Sehepmau. 90S
The specimeirs were dissected using staudard tech- 1
niques, under a steieomicroscope and immersed in fix- T\pe species: Psiudovocculiiui ni^osoplicdlii Schep-
Page 70 THE NAUTILUS, \ol. 1 17. No. 3
iiKiii, 19()S. In' siil)SfC|iU'nt (Icsiiiiiation. Wen/. 19.yS. simple. wcakK bilobed. Cill relatively small, with about
p. 450. 15-20 hkiments. l(4l end close to Inner edge of lelt
liranch ol shell muscle; gill narnnvs gradualK' towards
right, curving posteriorK, nmning between mantle and
PscudococculiiKi riiiiiilii new species right branch ol outer edge ol slu'll nmscle, up to about
(Figures l-.3()) mid-length ol animal. Gill filaments low. triangular, rod
Diagimsis: Sliell liigli. anterior re(j;ion stroiigK coii- narrow, located in anterior edge. Ctenidial vein con-
ca\t'. Sculpture oi eonecntric- uiululatioirs and tlireails. touring anterior part of gill edge. Low and long glan-
Snout flat, surrounded hv oral lappets. |a\\ plates thin. dular fold jiresent left hall ol gill and mantle edge. Rec-
Posterior odontoiihore earlilaiies eonneetcd to anterior tum ;ind pericardial structures located in posterior re-
one along median line. (ionad i-oiuieeted lo posterior gion ol root ol pallial ca\it\'. just posterior to gill, as di'-
enil of pallial ea\it\ In a gonodnet that runs trairsxersalK scrilu'd below.
anil dorsalK in visceral mass. Sperm duct mostK closed Msccnil Mass iFi^^ure 15): Compressed xcntralK b\'
itnliular^ opi'uing in a sulileriiiinal jiapilia. prost.ile in- loot and shell muscle. Stomach occupyingcentral region,
side right tentacle.
surrounded In digestixe gland and intestine. Cionad lo-
Desei-iption: Shell (Figures 1—4, 6-10) patellii'orm. cated in postero-xeutnil region, betxveen txvo intestinal
lengtli up to 3 nun, high (height fSO-709^ ol' length), loops. Digestive gland pale-brown, with small spots
white. relati\el\ thick. Protoconcli (Figures 6. 7) with lorming a net-like mosaic. CJonad cream-coloreil. A thin
one whorl, plauispiral. coiled towards \entral region, (li;iphragni-like membrane separates buccal mass Irom
with a papilla-like projection on each side oriented along remainingposterior structures (Figure 20, di): this mem-
direction ol coiling; outer surlace smooth, opaijue. Te- brane inserted in haemocoel surrounding buccal mass:
leoconch opaijUc. scniptni'e oi strong, conuii.irginal onl\ esophagus, anterior aorta and visceral nencs pass
growth lines and threads. Ape\ high, cuned \entrall\ ihidiigh membrane.
and posteriorK; situated along median line oi sliell, clos-
Cirnildliini aud Exrirtonj Si/striiis (Figures 5. 15, 19):
er to posterior region, .\nterioi' region eon\e\, posterior
Pericardinm ;ind both kidnexs Hatteuetl dorso-ventrally,
region weaklv concave. Inner surface gloss\'. Muscular
sitiKiled in roof of pallial caxitv, betxvi'cn gill and pos-
scar horseshoe-sliaped (conca\it\ anterior) (Figures 9.
10', narrow posteriorK, thick anteriorh; antt'rior ends terior end of this cavitx'. Pericardium broad, about txvice
heart area, located between lelt end ol gill and left
ciuAcd toward dorsal and posterior regions.
branch of shell muscle. Auricle triangular its right side
lIcdd-fiKit F/gfircv 2. //-/S', lleail [irolimlt'd. oei'u- attached to pericardium caxitv, contouring gill end with
f
pving about 1/3 of total \ohmie ol hi'ad-loot. Snout well a concMvitv; insertion of ctenidiiil vein somewhat broad
developed, somewhat Hat, edges broad, flat, extending in its anterior region; connection with \(>ntricle narrow,
externalK iFignres 1-1-17). Oral lappets (lateral expan- posterior N'entricle small and thick, muscular locatc^d
sions on snout1 large, covering mosi iil anterior half ol posteiior to ;inricle. close to rectum, \oii;i vcia small,
animal bod\. C^cplialic tentacles as\nnnetiical, right ten- posleiior ;iud at left Irom ventricle. Left, anterior kidnex'
tacle 50 7c larger tlian left tentacle (Figures Ifi. ]7\ act- elliplic;il, llatl<>ned. solid; located between gill posterior
ing as copnlaton organ idetaiK below i l-'oot sok\ or region and reeluiii. touching this latter Hight. jiosterior
mesopodiuni, flat, thick, occupving mosI ol veuti'al sm- kidnev, loiigei ;iii(l naiidwer situated on othei' side of
face (Figures 2. 14); anterior edge wiHi a xen n.iniiw leetuni ;il s;niie levi'l of lelt kidnex, extending little be-
and shallow furrow. Epipodi\un :ib()nt 'j ol shell width. vciiid il tow;inl light.
lmaonrtmlien;gIarefefaetdfgleap,wiitnhse2rtpe;idiisbeotlwleeennlacmleessoopnodeiaucnhisiadned. Dii^cs/iic Si/slcni (Fi<ntn's 2()~3()): Mouth atransversal
inner tentacles longer and slender onler tentacles slioii- slit located on autero-ventral region ol snout (Figures
er and broader (Figure IS). Shell nmscle horseshoc- I 4. 20'. Huce;il s|ihiueter (Figure 23. inc) well-developed
and thick, Hiiei;il iiKiss ven' large, about h:ilf ol hae-
bshraojaidede.r ajinodsttehriiocrkerretghiaonn lnealrti'haolwl;isl'h'eilglnrmeus1c5lLelgirg;hidtu;hialll\l iiKieiiel length, Oial tube ven short, broad. vv;ills thick,
becomes thicker toward anlerioi' region; on poslerioi' re- muscular; inner surface^ with low transxersal lolds. Buc-
gion of liead. sliell nmscle turns ;ibin])ll\. first in dorsal. cal mass \-slia|ied. odoutophore and eso|ihagns I'epre-
senting respectivelv veuti;il and dmsal Inauehes. Inner
then in posterior direction. Paired head nmscles origi-
nate as contiimatious ol die aiileld dois;il end ol shell smiaee of dors;il wall of bnc-cal mass with pair ol bi'oad
dors;il folds (Figure 2S) that imite anteriorlx. edges high-
muscle (Figure 15); right niiisele slighdv llaller ;ind
liroader than lelt muscle; both nm tow;ii(l mid-.inleiior ei III then iiiiibregioii. Doi'sal chamber (dc) (delimited
region immersed in tegument, lorminga \-slia|)ed slrnc- liv both dorsal folds' relativc^lv deep ;m(l broad; iimcr
tiu'c; both muscles attach, spicading out. into median suikice smooth, |;iw pkites verv thin, color pale brown;
anterior cwA rounded, situated just anterior to connec-
region ol head wall (Figure 20).
tion of dorsal folds (Figures 21. 23. 2S); |iosteri()r end
Mantle On^aiis fF/'gi/rcv 5, /ft. 17. IfJi: Pallial c;i\il\ ineiiiispicuous, gr;idiKillv vve;iker in poslerioi' direction
shallow, sliorter tliau 1/3 ol ;mimal Icni'th. Nhmlle edge up III pdsteiior level ol odoutophore iusi'i'tioii, ()donto-
L. H. L. SiiiKiiic ami C. Magenta. 2()()o Paw 71
Figures 1-10. I'snidonniiiliiiii liiniilii new spcT-ics. |-.'J. Dcirsal, \riilial. ami lateral dell) \lews ol holohpc |M'i(ir to extraction
ot spcciiiK'ii In.iiii sIr'II, Sialc liar = O.olt iiiiii. 4. I'ai.it\pi'. \oiiii'^ spciiiiuiL SKM, dorsal \ie\\. scale liar = 11.20 nnii. 5. Mool ol
pallial ca\it\' and adjacent portion ol pericardi.il striictnriA. \enlral \ie\\. Ili;lil niicrograpln. carnnne staui. Scale liar = 0.25 nun. (i.
Protoconch, SEM. dorsal \le\v Scale liar = O.Oo inni. 7. Same lateral ri>j;lit side' \ie\\. scale liar = 0.02 mm. S-10. Panitxpi-.
adult specinuai. Sl-^M. lateral lelt side . olilii|iie rl^lit'. ami miiIimI mcws Scale liar = 0..")(l mm
Page 72 THE NAUTILUS, \'ol. 117. No. .3
Vim
Fil^iircs I l-i:i. l\i tuliuluciiliiiii niiiiilii new s|ii'iics ShAI ol r.idiil.ii li-rlli Siair liars - "ill Hi .iiiil III [jLiii ri-spi-rtnclw
plinic [ica]-slia|)c(l. ucfU[niiig most ol liia-fal mass \ol- of uaridw \eii(ral tensor muscles ol railnla. oiiginating
iinic. Oiloiitopliorc niuscle.s (Figures 23-30): ml, si'rics in median corner ol [losterior cartilages, running toward
ol small and thin innsclc^s connecting hnccal mass to ad- anterior region on ventral surface of oilontophore close
jacent inner surface ol liaemocoel. more i-oncentrated to its median line, inserting in ventral end ofsuhradular
aroinul month; mla, pair ol narrow jngal muscles, orig- membrane. Other odontophore non-uuiscular struc-
inating in antero-\entral region ol inner surface ol snout. tures; <)c, anterior ]iair of cartilages, elliptical. Hat. soft.
running in postero-dorsal direction and inserted in \cn- slightK shorter than odonlophore length, anterior end
tral-posterior region orodoutopliore on lateral region of hroadK pointed, posterior enil hlnnt; po, posterior pair
posteriorcartilages; mj, pairol muscles movingoral tuhe ol cai'tilages. length about '/i of anterioi'cartilagi's. some-
and jaws, originating in mid-\eutra! region of odoiilo- whal <-ircnlar flat, onfei' surlace convex, inner surface
phoi'e. coulonring anterior edge of posterior cartilages. concave, covering postero-external surlace of anterior
nnuiing toward anterior region, in.sertion spread out he- cartilages; both pairs ol cartilages lused with each other
tween oral tuhe and dorsal wall of hnccal mass; m3, along their medi;in coiner Figure 29); br, suhradular
i
single trans\-ersal muscle. \en thin, located just wutral nu'iiibranc. Included in radular sac ami extending be-
to origin of esophagus in hnccal mass, uniting hotli siiles vond il, c-ovcring exposed surlace ol odontophore within
ol postero-dorsal surlac(> ol odontophore; m4, large pair buccal cavllv. connecting vvitli lining of oral cavitx': .sc,
ol dorsal tensor muscles ol suhrailnlar memhrani'. oiig- suhradular c;ulilage. a thin. trausp;ui'nt but strong nieni-
inating in latero-xcntral surlaces of anterior cartilages, brane coimecled In snlir.idiihir nu'iiibrane, coveringpart
running toward dorsal region, surrounding these carti- ol exposed ])or(ion ol odontophore In buccal cavitv (Fig-
lages and io\ering most ol their surlaces. jusertingalong ure 21). Hadular s;ie with about same length of odon-
suhradular memhrane in its exposed ifunctional) region; tojihore. cm-vt'tl In Its middle portion, located in middle-
a short portion also originates Irom posterior cartilages, right retiiou ol visceral mass (Figures 20. 21). Kadular
in their latero-\cntral surfaces; mo, pairofventral tensoi- nucleus covered bv a conspicuous membrane surround-
innscles ol radnla, originating in posterior edge of ]ios- ing ;i blood sinus (Figure 23). located in left-ventnil re-
teriorcartilage, rumiing toward meso-dorsal region, con- gion of visceral nuiss.
toiuing posterior edge ol anterior cartilage, iirserting In Kadnla asvnniK'tric;il. teeth rows olfset l)V row
ventral surface ol radular rihhon in posterior half of lis height: rachldian teeth apparentiv in level ol right half
exposed region: m5, a coutlnnatiou ofm4: m(), liorl/on- rows Hailiihii teeth i l'"ignres 11-13): 1) Rachidiau an-
tal uniscle, single, thin, uniting both anterior laililagcs tero-|)osteriorK long, laterallv narrow; base Hat. with
along their hmer-vcntral I'dges; m8, pairofai)|)roximalor edges slighllv elevated; distal cutting edge concave, low.
innscles of cartilages, connects anterior and posterior (lined inward: 2) Lateral teeth in five pairs; 2a) first
|)airs ol cartilages, originating from relativcK large areas later;il loolh triangular, as long as rai-hidian. base broad.
ol \eiitral surlace ol anterior cartilages, inserting in an- Ihil. sliiiiled; rem,lining region narrowing gradnallv; tip
terior and Inner edge of jiosterior cartilage: ml la, pair broadiv pointed, cimed inward: 2b) second, tlilicf ;iiid
L. H. L. Siinone and C. MaWMita. 2()():) Paet- 73
Pt tp pp
Figures 14-17. }\('iuliHi>iinliiui riiiiiiln new sprrics, analciiii\. 14. Ileail-lciiil and adjarciil mantle cdaie, \entral view. 15. W'liole
animal extracted Ikjui sliell. dorsal \ie\\. rool ol pallial ca\it\ partialK' renioxed, 16. Whole ,inimal, anterior \ie\\. rool ol pallial
eavitN sectioned at on right side then deflected to expose inner strnctnres. 17. IIe;id and adj.icent pallial strnetnres. anterior ihnt
sliijhtK fnini ri<j;ht side' \iew, roof ol pallial ea\itT.' defli'Cted, Scale hars = 0,5 nnn.
tdurtli latei.il tt'ftli ei|ual to each other, first tooth slii^lit- inner teeth larger, gradnalK deci'easing toward edge ol
1\' smaller, approxiiiiateK' hali size oi rachiclian, situated ribbon; larger tei'th about 1.5 x rachidian length; base
at same level ot hroader resjioii oi first lateral tooth; base slender and flat; middle region long, rod-like, tall,
somewhat narrow and short, situated at sona' distance straight; tip stronglv enned iiiw;inls, ;i|ie\ shaipK' point-
from adjacent teeth in same row'; hiteial eds^e high, ed, precetled b\' fi-S pairs ol small, slender, pointed
cuned ohli(juel\, tip shaqiK pointed, high, cni-ved in- cusps along both sides ol bro;idi'r are;i of tip.
ward: 2c) ontermost lateral tooth as long as rachidian, Origin ol esophagus marked l)y a sudden constriction
thick, cxlindrical; base narrow, increasing gradnallv to- ol dors;il chamber ot buccal mass (Figiu'es 21-23).
wards tlistal end; dist.il end expanding abrnplK. with Ksophagus narrow, inner surlace with pair ol low and
three snbtenniiial. low, iiiward-tnrneil, stnbin cnsps lo- narrow longitudinal folds (Figure 2S), a contiimation ol
cated on tliicker ri'gion; concave region located opposite dorsal folds of buccal mass. Esophagus runs contotu'ing
to cnsps. nestetl in liase of corresponding tooth ol ad- postero-lateral left surface ol odoiitophore toward pos-
jacent row; 3). Marginal teeth in fi()-(i5 pairs, all similar; tero-\entral region, beyond which it surrounds mid-ven-
Page 74 THE NAUTILUS, Vol. 117. No. 3
Figures 18-22. I'scudococciiliiKi rinuila new spccirs. ,iiialciiii\, IS. Wlioli' aiiiiiuil cxlnicti'd from slirll, postcricir view, mantle
edi^o (k'dcLtL'ti. 19. Posterior resjioii ol p.iili.il lool. ilois.il view, ilepuleil li\ tr.iiispai-eiK\. 20. Head, \eiitral \ieu, loot removed,
haemocoei exposed with inner stnietnres as in silii 21. Dinestne liilie as in \ilii. ilorsal \ie\\. strueliiics posterior to esophagus
sliiihtK delleeted. 22. Same, lateral ilell sidei \ie\\. Scale liars - (),.") mm.
tral surtaee ol lool alouti a hniad eiiiAc: alter tins esojili- geal eoimeetuin. Stonuuh \eiilial hall llattened and lon<j;.
agiis runs toward mid-dorsal reiiion. in direetion ol shell nan'owini^ i^radnalK- iimersurlaee ol stomach iridescent,
apc.x, ulicrc it inserts in stoniacii i i'"i<4nres 21. 221. "greenish. nij^cstiM' iil.md suiidundiuii; stomach lor most
.Stomach somewhat narrow and lontj. located trans- ol its area. Intestinal loojis eom|)le\. as shown in Fissures
vcrsalK in middle rc<j;ion ofxisccral mass; its dorsal hall 21 and 22.
broader and spherical (Fitjures 21. 22). with esophageal Intestine oriiiinates at flattened jxirtion ol stomach
connection located in its posterior region. Duct to di and IS inehuled m mid-\x>ntral re<j;ion ol \'isceral mass.
Ijestivc sjland narrow, inserted in left region ol esopha- Inteslme is conxointed; alter its oriiiin in stom.ieh it iims
L. H. L. Siiiioiif ami C. Masienta. 2()().i Pam* 75
Figures 2.'5-.'5(). I'si'iulncdrciiliim rinmlii new spccu's, tiircnul 23. WIhjIc annual, lateral Icll Mile - Imt slii;iitK wntral' \i<'«. 24.
(Jdoiitcipliorc. liorsal \ii'\\- 25. Same, \cntral xicu. 26. Odontdplimc. dorsal \ir\\, radula and sniii.idnlar cartilage reniowd, liotii
antcricir uailila'^cs di-llt'ctcd. 27. ()diintopli()ir. \rntral sii.'W- lirst laxiT (it nMisiJcs and nii-nilirancs nniiixcd 2S. l^cirsal wall nl
hnci'al mass and antrnor fscipliaiins. \eiitral-inncr view, 29. ( )di)nl(ipliiiic, dmsal \lc\\, drtall iit its ri'Jit side wUli niiist ninsili-s
drili-i'tcd liir sliiiwni',; rit^lit cartilaiics 30. Same rcprcsfiilatKin nl a lrans\cTsal section. Scale liars = (),,3 nnn.
i)l)li([ufl\' toward (lorso-latcia! rc<j;ion, surroiiiidintj \v\\- riinninn; parallel to it hut in opposite tlirt'ctioii; in latero-
tral Mirtacf cil stomacli; in laterei-dmsal ri'j;lit rci^icin (il doi'sal ritilit rt'^ion ol \iseeral mass intestine tleserihes
N'isceral iiias.s iiitcstiiit' dt'-scrilns liroail ciirxr Idw.ird pos- Net anollier luoad loop ventral to tlie previous loop,
ter()-\t'iitral rcifioii, runs down to inid-xciili.il rc^iiiii ol turuiii'j; .ilou'j, lioii/ontal plane toward lelt: in lateid-an-
\isceral mass, toiicliint; iinicr siniacf nl Idol atid sm- terior lelt i"e'j;ioii ot xiseer.il mass it eur\cs al)niptl\ to-
rouiidinw iiiitldlt- portion ot csopliatius; in tlii.s ri't^ion in- ward rii^lit region, snrroimdinii; oilontopliore; tliis last
testine cunes hroadK, returninii to its prexiou.s location. loop runs ol)li(jueK towarti latero-anterior right region
Page 76 THE NAUTILUS. Vol. 117, NO. 3
of roof"ofpallial ca\iU'. Anus locateil on latcro-po.stcrior Lean and IlarasewNch. 1995). Pseiulococrtilinti riiiiiild
risilit regioi) of roof of pallial cavih lool i l'"i^iirc 15). ap]iears to be the first occurrence of the genus in the
Atlantic'.
Rc}>ro(liiclirf Sijslcin {Fii^iiir /l;. Coiiail l()tatc<l in I'seudorocctiUna hiniila dillers Irom the renniining
latcro-posfciior left region oi xi.sccral mass, just (Iihs.lI cong<'ner species iu ha\ing a high shell and Iw lack of
to shell innsele. Testis more anterior, with smooth, nni- r;idial sculpture. F--:('iidococnil!)ia liiiiiila resembles F.
torin surface. 0\an' oeeupxing mid-jiosterior region ol ^re^iiria Marshall, 19S5. Irom New Zealand, b\it dif-
gonad, with granulose surface, (ioiiad wilh short projec- fers b\ ha\iug higher shell, narrower radnlar rachicli-
tion running along right edge ol icclnm (ioiiad gradn- an. and In dillerent characters of the copnlaton- right
alK heconies a gonodnet along middle pnitiiin of rec- tentacle, such as uncoiled sperm duct and absence of
tum, (ionoduct with thin, transjiareiit walls, running
papilla.
ohli(jneK on surface of visceral mass alongside rectum;
4'lie anatoiux' of the lunv species fits the general plan
opens in pallial ca\it\' posterior end, posterior to right described lor the famiK' llas/.prnuar. 19S7, 1988). .^n-
(posterior) kidnev (Figures 15, 19). \ shallow furrow ;itomieal characters defini(ng the lamilv are gonad divid-
runs from this ajierture, contouring laleio-posterior light ed into testis ;md o\ar\' and right cephalic tentacle as
corner of pallial ca\il\ In apertmc ol speiin duet (Figure copiilalor\ oigaii. However, the new species possesses
17). Posterior apeiture ol spi'rm Awci directed to lelt, some peculiarities, as, e.g., the apparent absence of sal-
protected 1)\' a pair ol diverging lolds. Spcnn duct \en' ivan glands (glands are sometimes poorlv developed in
narrow, thin-walleil, cntircK ilosed (tuhular), nuiuing
cocculiuiform limpets), the ventricle Iree from the rec-
along right edge of floor of pallial ca\it\ to an area an- tum, the presence of a short ojiened portion in the
ti'rior to right tentacle, where it lolds .il)iii[)tl\ toward speiui duct nnining on palli;il lloor; and the presence ol
left and penetrates base of right tentacle. Sperm dnet a visceral gonodnet. The gonodnet luis been regarded as
runs along right cephalic tentacle, its hasal 2/3 iuteuseK a modification of the right kidnev, but. if so, it is onlv
C'oiled and with thick glandulai' wails, thicker in its mid- part of the kidnev undenvent modification, since there
dnlaerrpoowrtiaonnd, tahhieinosgtrasdturaailgKhtna(lr<r'oigwusi',e it1s7).disStapler1m/3 d\'uecr\t irsigahtdektiedcnteavb.leinritghhet Fk.idrnici'nv.nlTdhgeonpordenseetn,ceisofloaunvedn.i-nlotnheg
opening in li|i ol snhterminal papilla; papilla c\linilrieal, comparable topologN' of YtKiuinaht/ssia earri/i McLean.
short, nested in a small couca\it\' (which nia\ indicatt' 19SS (na,szprunar,' 198S; fig. 2i.'The muscles of the
possilile ;iliilit\ to retrac-l). odontophore differ from those ol Kiinl(ihi/.\sia venezue-
Centml Serve Si/sfein {Figure 21 ': (;;mglia relatixcK Iciisis (McLean. 19SS; llas/prnuar, 1988: fig. 3) in laek-
small and separated from each other. Paired eereliral iu'j; or;il tube muscle and dorsal retractor of cartilages.
ganglia rel;iti\eK' distant Irom each olhei\ located in me- iind In ;i greater development ol the buec-.tl sphincter;
dialk in lati'ro-dorsal region ol hneall mass. Pedal gan- diller from those ol Coccojiii'^i/n hispidn Maishall. 1986
glia relati\cl\ close to eacli other, situated between mid- 1 llas/prunar. 1987: fig. 3) in lacking buccal dilators and
dle ,md ;inteiior portions ol \eiilial snrhice ol lHi(e:il \euti;il proti'actors ofcartilage, and also bv the great de-
uiass I'ignre 20'. Hemaining g;mgli;i not studied iu de- velopment ofthe buccal sphincter; diller from Cocculina
(
fails. iiippiniuii Kuroda ;ind 1 l:ibe. 1949 (Sasaki. 1998: fig. 70)
in kicking the pair ol ventral tensor uniscl("s ol radular
.S7/(// Mrdsiirciiiciils iLvwjjh. Wiillli. iiinl llif^hl in iiiiii ': s;ic. lacking the pair ol medi;m protractor nuiscle ol sub-
.\1'/SP 35.349 parat\pe #4; 3.0 l.\ 2.5 l)\ 1.7; #5; 3.3 1)\ radular membrane, and in h;iviug the p;iii- ol posterior
2.7 In 1.7; #fi; 3.1 in 2.fi In 1.9. c;u'tilai'es.
T\pe Material: liolotxpi' \!/.SP .35:5 IS; P;irat\pes;
\iZSP .3.5.349, 12 specimens; .\INHJ S9(i5. 3 spei'imeus LITKIi.VTUHF CITKH
(1 without shell); MNHN, 3 specimens I 1 without shell'.
all from t\]ie localit\. otter tr;iwl, ( :. .Magent.i leg,, \pr, 1i.is/pniiuir. (i. UJS7, .\ii,ilciiii\ .uid alliiillii's iil cocculiiiiil lim-
2002. pets (Mollusca. .\ichaei)gastri>p(i(laV /.ixiliigic.i Scripla 16:
305 .321.
TBivap/iel,L.o3c.a5l0i-t40y0: m dOefjfiths,ourtohcke\rnboI-titioomd.e |;m(ii'o Sl;ile, Ilas/pliuuiiidiarl.ii{i'i..pelUs)SSI M.ol.lVnuastcdaii.iv.\auniid;icaolil.iin;iitsilens)p(oii(lpals.cuZdooocloocgciicia-
Dislrihtilion: Know onK Irom t\pe loeaiitw Script,1 17 II1I-I79,
l,cal, II .iiiil \l C, ll;ua.scv\Afh. UM). Deepest .Atlantic
I
Habitat: Kock\ bottom. iiKilliisks: li.ida! Iniipels (Mollusca. (Jastropoda. Coccnlin-
iloriiaa' Iroiii the northern honndan nl the Carilihcan
Plate. Invertebrate Hiologv IIS: llfi-|.5(i
DISCUSSION l.c.il. |, II .iiul l.,M.l.. Sinionc. 2()()(). ('opiilahi/ssifi riosi. anew
The generic allocation ofthe new species is maiuK'based (tiheecpc-isieu;liinelnili;npi<l'tsloI](ii^'isotirlojIiSroad/a.i;l wli'tsheu((linmciioiciceuiliilnsiddi;ilcl)lieIrsvosm-
on the diagnosis ol tlii' gemis pro\ided b\ Maisluill ti'iii:itics of the genus. The Nautilus 1 11: ."iiJ liS.
(19S5: 522)' and llas/.pnmar (I9SS; tiib, 2. p.' 177'. with \l,irsli,[lf HA ]9S5. KfX'cnl ;inil tertian (^occuliiiicl.ic .ind
addition ol Inrther data Irom other ;iutliors i(•.«'. Mc- I'seiulocotculinidae (Mollusca: (Gastropod;!' hciiii New
L. R. I.. Sinuinc and C. Maa-iita. 2()()o
'/(aland and New Soiitli Wales New '/calaiHl |i)iirnalol Addisoniidac (Molliisca. ATchac()t;astn)]i()da' I'lniii tlic
/()iil()<^\ 12: 5()5-54fi, Soiitlicni Bra/iliaii coast. HiillcliM of Marine Scieiiei' 5S:
McLean, J. II. 19SS. I'lnei- new limpets n\ the lainiK P.sen- T75-7.S5.
dococciilinidae (roni alnssal depths i.Mdlliisca, .\rchaeo- Sa.saki, T. ]9yS. (^oiniiaratixc anatomv anil pli\loi;en\ oC tlic
gastropoda). Zoologica Scripta 17: 155-l(i(), recent ."Xrchacoga.stqioda (.Mollnsca: (iastropoda'. 'Hie
Mcl.,ean. ]. H. and .\I, (I. IlarasewNch. 1995. Hc\ie« olWest- Uniscrsitx Miiseinii. Tlie liii\ersit\ ol'Tok-Mi Hull<-tin .'5S;
ern Atlantic species ol cocciilimd and psendococciilinid 1-223.
limpets, witli ilesciipfions ot new species ((;a.stropo(la: \\"en/„ W. 193S. Castropoda. Teil 1: AllgenieinerTeil nnd I'ro-
(a)cculinil(irmiat. Contiihntions in Science. Natnral His- sobrancliia. Lielernng 3. In: O. H. Schindelwdll (ed.i
torvMiisenni of Los Angeles Connt\- 453: 1-33. Handbncli der Palao/.oologie. <\ Cehriider Biantr.ieger,
Si?none, L. R. L. 1996. Addi.soiiiii ciioilis. a new species ol Berlin, pp. 241-480.